JPH09209050A - Manufacture of sintered ore by high layer thickness - Google Patents
Manufacture of sintered ore by high layer thicknessInfo
- Publication number
- JPH09209050A JPH09209050A JP4033396A JP4033396A JPH09209050A JP H09209050 A JPH09209050 A JP H09209050A JP 4033396 A JP4033396 A JP 4033396A JP 4033396 A JP4033396 A JP 4033396A JP H09209050 A JPH09209050 A JP H09209050A
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- JP
- Japan
- Prior art keywords
- raw material
- layer
- sintered
- sintering raw
- sintering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高炉等で溶銑を製
造する際の原料となる焼結鉱の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sintered ore, which is a raw material for producing hot metal in a blast furnace or the like.
【０００２】[0002]
【従来の技術】従来の焼結鉱の製造方法の概略を図８及
び図９に示す。2. Description of the Related Art An outline of a conventional method for producing a sintered ore is shown in FIGS.
【０００３】まず、図８に示した従来の焼結鉱の製造方
法は、サージホッパー２にいったん貯えた焼結原料１を
シュート３を介してパレット８上に装入し、焼結原料充
填層６を形成する。この焼結原料充填層６の上面表層部
分のコークスに点火炉７で点火したのち、吸引負圧を例
えば１０００ｍｍＡｑとして空気を下方に吸引しながら
焼結原料充填層６のコークスを燃焼させ、この燃焼熱で
上層から下層にかけて順次原料を焼結していく。この方
法によるときの焼結原料充填層６の層厚は例えば６００
ｍｍである。First, in the conventional method for manufacturing a sintered ore shown in FIG. 8, the sintering raw material 1 once stored in the surge hopper 2 is loaded on the pallet 8 via the chute 3 to form a sintering raw material packed bed. 6 is formed. After igniting the coke on the upper surface portion of the sintering raw material filled layer 6 in the ignition furnace 7, the coke of the sintering raw material filled layer 6 is burned while sucking air downward at a suction negative pressure of, for example, 1000 mmAq. The raw materials are sequentially sintered by heat from the upper layer to the lower layer. The layer thickness of the sintering material filling layer 6 according to this method is, for example, 600
mm.
【０００４】また、図９に示したように、焼結原料充填
層を２段にする従来の焼結鉱の製造方法は、サージホッ
パー２にいったん貯えた焼結原料１をシュート３を介し
てパレット８上に装入し、最初に下段の焼結原料充填層
６を形成する。このときの焼結原料充填層６の層厚は例
えば４００ｍｍである。この焼結原料充填層６の上面表
層部分のコークスに点火炉７で点火したのち、この下段
の焼結原料充填層６が徐々に焼結していく。Further, as shown in FIG. 9, in the conventional method for producing a sintered ore having two layers of the sintering raw material packed layer, the sintering raw material 1 once stored in the surge hopper 2 is passed through the chute 3 through the chute 3. It is loaded on the pallet 8 and the lower layer of the sintering raw material filling layer 6 is formed first. The layer thickness of the sintering material filling layer 6 at this time is 400 mm, for example. After the coke in the surface layer of the upper surface of the sintering raw material filling layer 6 is ignited in the ignition furnace 7, the sintering raw material filling layer 6 in the lower stage is gradually sintered.
【０００５】その後さらに、サージホッパー２ａにいっ
たん貯えた焼結原料１ａをシュート３ａを介してパレッ
ト８ａ上に装入し、下段の焼結原料充填層６の上に上段
の焼結原料充填層６ａを形成する。この焼結原料充填層
６ａの上面表層部分のコークスにも点火炉７ａで点火
し、上段と下段の両方で焼結が進行していくようにす
る。このときの上段の焼結原料充填層６ａの層厚は例え
ば３００ｍｍであり、上段と下段とを合わせると焼結原
料充填層は合計７００ｍｍになる。一方、上段、あるい
は下段の吸引負圧は例えば１０００ｍｍＡｑとする。Thereafter, the sintering raw material 1a once stored in the surge hopper 2a is charged into the pallet 8a via the chute 3a, and the upper sintering raw material filling layer 6a is placed on the lower sintering raw material filling layer 6. To form. The coke in the surface layer of the upper surface of the sintering material filling layer 6a is also ignited in the ignition furnace 7a so that the sintering proceeds in both the upper and lower stages. At this time, the layer thickness of the upper sintering raw material filled layer 6a is, for example, 300 mm, and the total of the sintering raw material filled layers is 700 mm when the upper and lower layers are combined. On the other hand, the suction negative pressure in the upper stage or the lower stage is, for example, 1000 mmAq.
【０００６】このように、上段及び下段の両方の焼結原
料充填層中を空気が下方に流れていくように吸引しなが
ら焼結原料充填層のコークスを燃焼させると、このとき
発生する燃焼熱によって上段及び下段が同時に上層から
下層にかけて順次原料を焼結していく。[0006] As described above, when the coke in the sintering raw material packed bed is burned while sucking air so that air flows downward in both the upper and lower sintering raw material packed beds, the combustion heat generated at this time is generated. The upper and lower layers simultaneously sinter the raw materials from the upper layer to the lower layer.
【０００７】[0007]
【発明が解決しようとする課題】これらの従来の焼結鉱
の製造方法は、焼結原料が細粒であるために焼結原料充
填層中の通気が悪く、コークスの燃焼速度が遅くなる結
果、焼結に時間がかかるようになり、生産性が低くなる
という問題がある。また、焼結原料充填層中の通気が悪
いため局部的なコークスのムラ焼けが生じ、コークスに
由来するＮＯｘの発生が多くなって環境上問題となって
いる。These conventional methods for producing sinter result in that the sintering raw material is fine particles, so that the ventilation in the sintering raw material packed bed is poor and the burning rate of coke becomes slow. However, there is a problem in that it takes a long time to sinter and the productivity becomes low. In addition, since the air permeability in the sintering raw material packed bed is poor, local uneven burning of the coke occurs, and NOx originating from the coke increases, which is an environmental problem.
【０００８】[0008]
【課題を解決するための手段】本発明の高層厚による焼
結鉱の製造方法は、上記課題を解決するものであり、下
方吸引式焼結機を用い、上段と下段の２層からなる焼結
原料充填層を形成して焼結原料を焼結するに際し、最初
に、下段のシンターケーキを支持するためのスタンドを
設けたパレット上に下段の焼結原料充填層を形成したの
ち、この下段の焼結原料充填層の上面表層部分にあるコ
ークスに点火して下段のシンターケーキを製造開始し、
生成したシンターケーキを前記スタンドが支持するよう
になった時点以降に、その下段のシンターケーキ上に上
段の焼結原料充填層を形成し、この上段の焼結原料充填
層の上面表層部分にあるコークスにも点火して上段のシ
ンターケーキを製造開始することを特徴とする高層厚に
よる焼結鉱の製造方法である。その際、下段の焼結原料
充填層厚は５００ｍｍ以上２，０００ｍｍ以下、上段の
焼結原料充填層厚は３００ｍｍ以上６００ｍｍ以下とす
るのが好ましい。The method for producing a sintered ore with a high layer thickness according to the present invention is to solve the above-mentioned problems and uses a lower suction type sintering machine to form a calcination consisting of two layers of upper and lower layers. When forming the binder raw material filling layer and sintering the sintering raw material, first, after forming the lower sintering raw material filling layer on the pallet provided with a stand for supporting the lower sintering cake, the lower stage Ignite the coke in the surface layer of the upper surface of the sintering raw material packed layer of to start the production of the lower sinter cake,
From the time when the stand comes to support the produced sinter cake, the upper sintering raw material-filled layer is formed on the lower sinter cake, and the upper surface layer portion of the upper sintering raw material-filled layer is present. It is a method for producing a sintered ore having a high layer thickness, which is characterized in that the coke is also ignited to start producing an upper sinter cake. At that time, it is preferable that the thickness of the lower layer of the sintering raw material packed layer is 500 mm or more and 2,000 mm or less and the thickness of the upper layer of the sintering raw material packed layer is 300 mm or more and 600 mm or less.
【０００９】本発明では焼結原料充填層を２層構造と
し、そのうち下段の焼結原料充填層は、高さがその層厚
以下であるスタンドを設置したパレットを用いて焼結す
る。このようにして下段の焼結原料充填層に生成したシ
ンターケーキ（焼結鉱層）の荷重をスタンドで支持する
ため、下段のシンターケーキよりも下層にある焼結原料
充填層にシンターケーキの荷重が上から掛かることがな
く、また、下段のシンターケーキの上に形成された上段
の焼結原料充填層の荷重もこの部分の焼結原料充填層に
掛かることがなく、焼結原料充填層が圧密化されないの
で、焼結原料充填層の通気性が改善され、生産性が向上
する。In the present invention, the sintering raw material filled layer has a two-layer structure, and the lower portion of the sintering raw material filled layer is sintered using a pallet provided with a stand whose height is equal to or less than the layer thickness. In this way, since the load of the sinter cake (sintered ore layer) generated in the lower sintering raw material packed bed is supported by the stand, the load of the sinter cake in the lower sintering raw material packed bed is lower than that of the lower sinter cake. It is not applied from above, and the load of the upper sintering raw material filling layer formed on the lower sintering cake is not applied to this portion of the sintering raw material filling layer. Since it is not converted, the air permeability of the sintering raw material filling layer is improved and the productivity is improved.
【００１０】さらに、上段の焼結原料充填層で発生した
排ガスを下段の焼結原料充填層に吸引するため、上段の
焼結原料充填層の排ガスに含まれているＮＯｘが下段の
焼結原料充填層のコークス燃焼によって生成するＣＯガ
スにより還元され、コークス中のＮのＮＯｘへの転換率
が低下し、ＮＯｘの発生量が減少する。Further, since the exhaust gas generated in the upper sintering raw material packed bed is sucked into the lower sintering raw material packed bed, NOx contained in the exhaust gas of the upper sintering raw material packed bed is lower sintering raw material. It is reduced by the CO gas generated by the coke combustion of the packed bed, the conversion rate of N in the coke to NOx decreases, and the amount of NOx generated decreases.
【００１１】下段の焼結原料充填層厚は５００ｍｍ以上
２０００ｍｍ以下が好ましい。下段の焼結原料充填層で
は、パレットに設置されたスタンドによりシンターケー
キの荷重がその下層にある焼結原料充填層に掛からない
ので、層厚２０００ｍｍまでは通気性に悪影響を与えな
い。しかし、層厚が２０００ｍｍを超えると、スタンド
がシンターケーキを支持するようになるまでに焼結原料
自身の荷重による悪影響が現れる。一方、下段の焼結原
料充填層厚が５００ｍｍ未満であると、通気性はそれ程
悪くはならないから、本発明のように、特別にスタンド
を設置したパレットを用いる意味がなく、また、低歩留
となる焼結表層部分の割合が大きくなり、全体の歩留の
低下が目立つようになる。The thickness of the lower layer of the sintering raw material packed layer is preferably 500 mm or more and 2000 mm or less. In the lower sintering raw material filled layer, the load of the sinter cake is not applied to the lower sintering raw material filled layer by the stand installed on the pallet, so that the air permeability is not adversely affected up to a layer thickness of 2000 mm. However, if the layer thickness exceeds 2000 mm, the load of the sintering raw material itself has an adverse effect until the stand supports the sinter cake. On the other hand, if the thickness of the lower layer of the sintering raw material packed layer is less than 500 mm, the air permeability does not deteriorate so much, so it is meaningless to use a pallet with a stand installed as in the present invention, and the yield is low. The ratio of the sintered surface layer portion becomes large, and the decrease in the overall yield becomes conspicuous.
【００１２】一方、上段の焼結原料充填層厚は３００ｍ
ｍ以上６００ｍｍ以下が好ましい。上段の焼結原料充填
層にはスタンドを設置していないので通気性改善の手段
がなく、従って、層厚６００ｍｍ超では通気性に悪影響
が大きく現れる。また、層厚３００ｍｍ未満では低歩留
となる焼結表層部分の割合が大きくなり、全体の歩留低
下が目立つようになる。On the other hand, the thickness of the upper layer of the sintering raw material packed layer is 300 m.
It is preferably m or more and 600 mm or less. Since there is no stand in the upper sintering raw material packed layer, there is no means for improving air permeability. Therefore, if the layer thickness exceeds 600 mm, the air permeability is greatly adversely affected. Further, if the layer thickness is less than 300 mm, the ratio of the sintered surface layer portion having a low yield increases, and the overall yield decrease becomes conspicuous.
【００１３】[0013]
【実施例１】図１に示すように、サージホッパー２に焼
結原料１をいったん貯え、シュート３を介してこれを図
２、図３に示すようにスタンド２１を設置したパレット
８ａに装入して下段の焼結原料充填層６を形成した。こ
のときの下段の焼結原料充填層６の層厚は６００ｍｍと
した。そのあと、この下段の焼結原料充填層６の表層部
分にあるコークスに点火炉７で点火し、上層から下層に
向かって下方に空気を吸引しながら焼結した。[Embodiment 1] As shown in FIG. 1, the sintering raw material 1 is temporarily stored in a surge hopper 2 and is inserted into a pallet 8a provided with a stand 21 as shown in FIGS. 2 and 3 via a chute 3. Then, the lower layer of the sintering raw material filling layer 6 was formed. At this time, the layer thickness of the lower sintering raw material filling layer 6 was 600 mm. Then, the coke in the surface layer portion of the sintering raw material packed layer 6 in the lower stage was ignited in the ignition furnace 7 and sintered while sucking air downward from the upper layer to the lower layer.
【００１４】図３において、パレット長さ２５は１ｍ、
パレット幅２７は４ｍとした。また、スタンド高さ２２
は４５０ｍｍ、スタンド上部幅２３は３００ｍｍ、スタ
ンド下部幅２４は５００ｍｍとし、スタンド間隔２６は
１ｍとした。In FIG. 3, the pallet length 25 is 1 m,
The pallet width 27 was 4 m. Also, stand height 22
Is 450 mm, the stand upper width 23 is 300 mm, the stand lower width 24 is 500 mm, and the stand gap 26 is 1 m.
【００１５】下段の焼結原料充填層６の焼結が進行し、
生成したシンターケーキ１０の下端がスタンド２１の頂
部に掛かると、シンターケーキ１０の荷重はスタンド２
１により支持されるようになり、下段の焼結原料充填層
６のシンターケーキ１０よりも下層の部分に荷重が掛か
らなくなって、この部分の通気性が改善された。Sintering of the lower sintering raw material filling layer 6 progresses,
When the lower end of the generated sinter cake 10 hangs on the top of the stand 21, the load of the sinter cake 10 is increased by the stand 2.
1, the load was not applied to the lower layer of the sintering raw material filling layer 6 below the sinter cake 10, and the air permeability of this portion was improved.
【００１６】このように下段の焼結原料充填層６のシン
ターケーキ１０がスタンド２１により支持されるように
なった時点で、サージホッパー２ａにいったん貯えた焼
結原料１ａをシュート３ａを介してパレット８ａ上に図
２に示すように装入し、上段の焼結原料充填層６ａを形
成した。このときの上段の焼結原料充填層６ａの層厚は
４００ｍｍとした。そのあと、この上段の焼結原料充填
層６ａの表層部分にあるコークスに点火炉７ａで点火し
たのち、上段及び下段の焼結原料充填層に対して吸引負
圧１０００ｍｍＡｑで空気を吸引しながら焼結原料充填
層のコークスを燃焼させ、この燃焼熱で上段及び下段そ
れぞれの上層から下層にかけて順次原料を焼結した。When the sinter cake 10 of the lower sintering raw material packed layer 6 is supported by the stand 21 as described above, the sintering raw material 1a once stored in the surge hopper 2a is palletized through the chute 3a. As shown in FIG. 2, it was charged on 8a to form an upper sintering raw material filled layer 6a. At this time, the layer thickness of the upper sintering raw material filling layer 6a was 400 mm. After that, the coke in the surface layer portion of the upper sintering raw material packed layer 6a is ignited in the ignition furnace 7a, and then burned while sucking air at a suction negative pressure of 1000 mmAq to the upper and lower sintering raw material filled layers. The coke in the binder raw material packed bed was burned, and the combustion heat was used to sequentially sinter the raw material from the upper layer to the lower layer of each of the upper and lower layers.
【００１７】図４に示すように、従来の焼結法では、下
段の焼結原料充填層に上段の焼結原料充填層の荷重がす
べて掛かる。しかし、本発明では上段の焼結原料充填層
上層の荷重は上段の焼結原料充填層下層に掛かるもの
の、下段の焼結原料充填層に上段の焼結原料充填層の荷
重が全く掛からない。このため下段のシンターケーキよ
りも下層にある焼結原料充填層が圧密化されず、焼結原
料充填層の通気が改善された。すなわち、実施例１の生
産性は５３．８ｔ／ｄ／ｍ2 であり、図８に示す従来の
焼結法の生産性２９．７ｔ／ｄ／ｍ2 に対して２４．１
ｔ／ｄ／ｍ2 向上し、図９に示す従来の２段焼結法の生
産性３９．１ｔ／ｄ／ｍ2 に対して１４．７ｔ／ｄ／ｍ
2 向上した。また、実施例１のＮＯｘ転換率は２９．６
％であり、図８に示す従来の焼結法のＮＯｘ転換率３
５．７％に対して６．１％低下し、図９に示す従来の２
段焼結法のＮＯｘ転換率３３．４％に対して３．８％低
下した。As shown in FIG. 4, in the conventional sintering method, the load of the upper sintering raw material filled layer is entirely applied to the lower sintering raw material filled layer. However, in the present invention, the load of the upper sintering raw material-filled layer is applied to the lower layer of the upper sintering raw material-filled layer, but the load of the upper sintering raw material-filled layer is not applied to the lower sintering raw material-filled layer. For this reason, the sintering raw material filled layer located below the lower sinter cake was not consolidated, and the ventilation of the sintering raw material filled layer was improved. That is, the productivity of Example 1 is 53.8 t / d / m 2, which is 24.1 as compared with the productivity of 29.7 t / d / m 2 of the conventional sintering method shown in FIG.
t / d / m 2 increased, 14.7t / d / m with respect to productivity 39.1t / d / m 2 of a conventional two-step sintering method shown in FIG. 9
2 improved. Further, the NOx conversion rate of Example 1 was 29.6.
%, And the NOx conversion rate of the conventional sintering method shown in FIG. 3 is 3
It was decreased by 6.1% from 5.7%, and the conventional 2 shown in FIG.
The NOx conversion rate of the stepwise sintering method was 3.8% lower than that of 33.4%.
【００１８】[0018]
【実施例２】図１に示すように、サージホッパー２に焼
結原料１をいったん貯え、シュート３を介してこれを図
５、図６に示すようにスタンド２１を設置したパレット
８ａに装入して下段の焼結原料充填層６を形成した。こ
のときの下段の焼結原料充填層６の層厚は８００ｍｍと
した。そのあと、この下段の焼結原料充填層６の表層部
分にあるコークスに点火炉７で点火し、上層から下層に
向かって下方に空気を吸引しながら焼結した。[Embodiment 2] As shown in FIG. 1, the surge raw material 1 is temporarily stored in the surge hopper 2 and is charged through the chute 3 into the pallet 8a provided with the stand 21 as shown in FIG. 5 and FIG. Then, the lower layer of the sintering raw material filling layer 6 was formed. At this time, the layer thickness of the lower sintering raw material filling layer 6 was 800 mm. Then, the coke in the surface layer portion of the sintering raw material packed layer 6 in the lower stage was ignited in the ignition furnace 7 and sintered while sucking air downward from the upper layer to the lower layer.
【００１９】図６において、パレット長さ２５は１．５
ｍ、パレット幅２７は５ｍとした。また、スタンド高さ
２２は６００ｍｍ、スタンド上部幅２３は７００ｍｍ、
スタンド下部幅２４は１０００ｍｍとし、スタンド間隔
２６は１ｍとした。In FIG. 6, the pallet length 25 is 1.5.
The pallet width 27 was 5 m. Also, the stand height 22 is 600 mm, the stand upper width 23 is 700 mm,
The width 24 of the lower part of the stand was 1000 mm, and the space 26 between the stands was 1 m.
【００２０】下段の焼結原料充填層６の焼結が進行し、
生成したシンターケーキ１０の下端がスタンド２１の頂
部に掛かると、シンターケーキ１０の荷重はスタンド２
１により支持されるようになり、下段の焼結原料充填層
６のシンターケーキ１０よりも下層の部分に荷重が掛か
らなくなって、この部分の通気性が改善された。Sintering of the lower sintering raw material packed layer 6 proceeds,
When the lower end of the generated sinter cake 10 hangs on the top of the stand 21, the load of the sinter cake 10 is increased by the stand 2.
1, the load was not applied to the lower layer of the sintering raw material filling layer 6 below the sinter cake 10, and the air permeability of this portion was improved.
【００２１】このように下段の焼結原料充填層６のシン
ターケーキ１０がスタンド２１により支持されるように
なった時点で、サージホッパー２ａにいったん貯えた焼
結原料１ａをシュート３ａを介してパレット８ａ上に図
５に示すように装入し、上段の焼結原料充填層６ａを形
成した。このときの上段の焼結原料充填層６ａの層厚は
５００ｍｍとした。そのあと、この上段の焼結原料充填
層６ａの表層部分にあるコークスに点火炉７ａで点火し
たのち、上段及び下段の焼結原料充填層に対して吸引負
圧１０００ｍｍＡｑで空気を吸引しながら焼結原料充填
層のコークスを燃焼させ、この燃焼熱で上段及び下段そ
れぞれの上層から下層にかけて順次原料を焼結した。When the sinter cake 10 of the lower sintering raw material packed layer 6 is supported by the stand 21 as described above, the sintering raw material 1a once stored in the surge hopper 2a is palletized through the chute 3a. 8a was charged as shown in FIG. 5 to form an upper sintering raw material filled layer 6a. At this time, the layer thickness of the upper sintering raw material filling layer 6a was set to 500 mm. After that, the coke in the surface layer portion of the upper sintering raw material packed layer 6a is ignited in the ignition furnace 7a, and then burned while sucking air at a suction negative pressure of 1000 mmAq to the upper and lower sintering raw material filled layers. The coke in the binder raw material packed bed was burned, and the combustion heat was used to sequentially sinter the raw material from the upper layer to the lower layer of each of the upper and lower layers.
【００２２】図７に示すように、従来の焼結法では、下
段の焼結原料充填層に上段の焼結原料充填層の荷重がす
べて掛かる。しかし、本発明では上段の焼結原料充填層
上層の荷重は上段の焼結原料充填層下層に掛かるもの
の、下段の焼結原料充填層に上段の焼結原料充填層の荷
重が全く掛からない。このため下段のシンターケーキよ
りも下層にある焼結原料充填層が圧密化されず、焼結原
料充填層の通気が改善された。すなわち、実施例２の生
産性は５５．８ｔ／ｄ／ｍ2 であり、図８に示す従来の
焼結法の生産性２９．７ｔ／ｄ／ｍ2 に対して２６．１
ｔ／ｄ／ｍ2 向上し、図９に示す従来の２段焼結法の生
産性３９．１ｔ／ｄ／ｍ2 に対して１６．７ｔ／ｄ／ｍ
2 向上した。また、実施例２のＮＯｘ転換率は２９．０
％であり、図８に示す従来の焼結法のＮＯｘ転換率３
５．７％に対して６．７％低下し、図９に示す従来の２
段焼結法のＮＯｘ転換率３３．４％に対して４．４％低
下した。As shown in FIG. 7, in the conventional sintering method, the load of the upper sintering raw material filled layer is entirely applied to the lower sintering raw material filled layer. However, in the present invention, the load of the upper sintering raw material-filled layer is applied to the lower layer of the upper sintering raw material-filled layer, but the load of the upper sintering raw material-filled layer is not applied to the lower sintering raw material-filled layer. For this reason, the sintering raw material filled layer located below the lower sinter cake was not consolidated, and the ventilation of the sintering raw material filled layer was improved. That is, the productivity of Example 2 was 55.8 t / d / m 2 , which was 26.1 compared to the productivity of 29.7 t / d / m 2 of the conventional sintering method shown in FIG.
Improved t / d / m 2 and productivity of the conventional two-stage sintering method shown in FIG. 9 was 36.7 t / d / m 2 compared to 16.7 t / d / m.
2 improved. Further, the NOx conversion rate of Example 2 was 29.0.
%, And the NOx conversion rate of the conventional sintering method shown in FIG. 3 is 3
This is 6.7% lower than 5.7%, and the conventional 2 shown in FIG.
The NOx conversion rate of the stepwise sintering method was 4.4% lower than that of 33.4%.
【００２３】[0023]
【発明の効果】本発明によれば、従来の焼結鉱の製造方
法に比較して生産性が向上し、ＮＯｘ転換率が低下す
る。According to the present invention, the productivity is improved and the NOx conversion rate is reduced as compared with the conventional method for producing a sintered ore.
【図１】本発明の焼結鉱の製造方法の概略を示す図であ
る。FIG. 1 is a diagram showing an outline of a method for producing a sintered ore according to the present invention.
【図２】焼結原料充填層の断面を示す図である。FIG. 2 is a view showing a cross section of a sintering raw material filling layer.
【図３】パレットへのスタンドの設置状況を示す図であ
る。FIG. 3 is a view showing how the stand is installed on a pallet.
【図４】焼結原料充填層の層厚方向各位置に掛かる荷重
を示す図である。FIG. 4 is a diagram showing a load applied to each position in a layer thickness direction of a sintering raw material filling layer.
【図５】焼結原料充填層の断面を示す図である。FIG. 5 is a view showing a cross section of a sintering raw material filling layer.
【図６】パレットへのスタンドの設置状況を示す図であ
る。FIG. 6 is a diagram showing how a stand is installed on a pallet.
【図７】焼結原料充填層の層厚方向各位置に掛かる荷重
を示す図である。FIG. 7 is a diagram showing a load applied to each position in the layer thickness direction of a sintering raw material filling layer.
【図８】従来の焼結鉱の製造方法の概略を示す図であ
る。FIG. 8 is a diagram showing an outline of a conventional method for producing a sintered ore.
【図９】従来の焼結鉱の製造方法の概略を示す図であ
る。FIG. 9 is a diagram showing an outline of a conventional method for producing a sintered ore.
１、１ａ 焼結原料 ２、２ａ サージホッパー ３、３ａ シュート ４ 床敷ホッパー ５ 床敷 ６、６ａ 焼結原料充填層 ７、７ａ 点火炉 ８、８ａ パレット ９ ウインドボックス １０、１０ａ シンターケーキ １１ 集塵機 １２ 脱硫装置 １３ ブロアー １４ 煙突 ２１ スタンド ２２ スタンド高さ ２３ スタンド上部幅 ２４ スタンド下部幅 ２５ パレット長さ ２６ スタンド間隔 ２７ パレット幅 1, 1a Sintering raw material 2, 2a Surge hopper 3, 3a Chute 4 Bedding hopper 5 Bedding 6,6a Sintering raw material packed bed 7, 7a Ignition furnace 8, 8a Pallet 9 Windbox 10, 10a Sinter cake 11 Dust collector 12 Desulfurizer 13 Blower 14 Chimney 21 Stand 22 Stand height 23 Stand upper width 24 Stand lower width 25 Pallet length 26 Stand spacing 27 Pallet width
Claims (2)
２層からなる焼結原料充填層を形成して焼結原料を焼結
するに際し、最初に、下段のシンターケーキを支持する
ためのスタンドを設けたパレット上に下段の焼結原料充
填層を形成したのち、この下段の焼結原料充填層の上面
表層部分にあるコークスに点火して下段のシンターケー
キを製造開始し、生成したシンターケーキを前記スタン
ドが支持するようになった時点以降に、その下段のシン
ターケーキ上に上段の焼結原料充填層を形成し、この上
段の焼結原料充填層の上面表層部分にあるコークスにも
点火して上段のシンターケーキを製造開始することを特
徴とする高層厚による焼結鉱の製造方法。1. When sintering a sintering raw material by using a lower suction type sintering machine to form a sintering raw material filling layer consisting of two layers of an upper stage and a lower stage, first, the lower sintering cake is supported. After forming the lower sintering raw material packed layer on the pallet provided with a stand for this, ignite the coke in the upper surface layer part of the lower sintering raw material packed layer to start the production of the lower sintering cake and generate it. After the time when the stand comes to support the sintered cake, the upper sintering raw material packed layer is formed on the lower sintered cake, and the coke on the upper surface layer portion of the upper sintered raw material packed layer is formed. The method for producing a sintered ore according to a high layer thickness, which comprises igniting and starting production of an upper sinter cake.
上２，０００ｍｍ以下、上段の焼結原料充填層厚を３０
０ｍｍ以上６００ｍｍ以下とすることを特徴とする請求
項１記載の高層厚による焼結鉱の製造方法。2. The thickness of the lower layer of the sintering raw material packed layer is 500 mm or more and 2,000 mm or less, and the thickness of the upper layer of the sintering raw material packed layer is 30 mm.
The method for producing a sinter according to claim 1, wherein the thickness is 0 mm or more and 600 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4033396A JPH09209050A (en) | 1996-02-05 | 1996-02-05 | Manufacture of sintered ore by high layer thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4033396A JPH09209050A (en) | 1996-02-05 | 1996-02-05 | Manufacture of sintered ore by high layer thickness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09209050A true JPH09209050A (en) | 1997-08-12 |
Family
ID=12577707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4033396A Withdrawn JPH09209050A (en) | 1996-02-05 | 1996-02-05 | Manufacture of sintered ore by high layer thickness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09209050A (en) |
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| CN102803884A (en) * | 2010-03-24 | 2012-11-28 | 新日本制铁株式会社 | Sintering palette carriage, sintering machine provided with sintering palette carriage, and sintered ore producing method |
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-
1996
- 1996-02-05 JP JP4033396A patent/JPH09209050A/en not_active Withdrawn
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